Arctagrostis latifolia subsp. arundinacea

(Trin.) Tzvelev
Common names: Reed polargrass
Synonyms: Arctagrostis poaeoides Arctagrostis arundinacea Arctagrostis angustifolia
Treatment appears in FNA Volume 24. Treatment on page 678.

Culms (24) 50-150 cm; uppermost nodes usually towards the middle of the culm. Uppermost sheaths shorter than the blades; blades 4-36 cm long, 2.4-15 mm wide. Panicles (4) 10-35 (44) cm long, 0.7-10 (14+) cm wide; longest branches (1.4) 3-27 cm, with (5) 50-140 spikelets per branch; secondary branches usually spreading. Spikelets 3-5.2 mm. Glumes unequal; lower glumes 2.3-3.6 mm, 1 (2) -veined; upper glumes 3-4.8 mm, shorter than to longer than the lemmas, 3-veined; lemmas 2.4-4.8 mm; anthers 1.3-3.5 mm. 2n = 28, 42.

Discussion

Arctagrostis latifolia subsp. arundinacea is the predominant subspecies from Alaska east to the western Northwest Territories, northern British Columbia, and Alberta. Cultivars for hay and revegetation mixes have been developed.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

membranous +  and scarious +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
Mucronate (?) +, Obtuse (?) +  and Acute (?) +
Susan G. Aiken +
(Trin.) Tzvelev +
1 (?) +  and 3 (?) +
straight +
basal +  and terminal +
keeled +  and rounded +
pseudopetiolate +  and branching +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
4 cm40 mm <br />0.04 m <br /> (36 cm360 mm <br />0.36 m <br />) +
not evident +
cross +, linear +  and narrowly lanceolate +
2.4mm;15mm +
scabridulous +
spikelike +
Reed polargrass +
not branching +
10 cm100 mm <br />0.1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
50 cm500 mm <br />0.5 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
not woody +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Alta. +, B.C. +, Greenland +, Nfld. and Labr. (Nfld.) +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +  and Alaska +
1/4 +  and 1/3 +
liquid +, soft +  and hard +
capillary +
sometimes longer +
single +, 2 +  and 1 +
sterile +  and bisexual +
compressed +
reduced +
shorter or longer +
subtending +
unequal +
uncinate +
1/4 +  and 1/3 +
puberulent +  and scabrous +
lanceolate +  and ovate +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
lacerate +  and obtuse +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
membranous +
inconspicuous +
lanceolate +
3 cm30 mm <br />0.03 m <br /> (27 cm270 mm <br />0.27 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
concealed +  and prominent +
2 +  and 1 +
well-developed +
2-keeled +
10cm +  and 35cm +
stiffly erect +  and spreading +
spikelike +
0.7 cm7 mm <br />0.007 m <br /> (10 cm100 mm <br />0.1 m <br />) +
dry +  and fleshy +
scabrous +  and hairy +
50 +  and 140 +
compressed +
0.3 cm3 mm <br />0.003 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
1 (?) +  and 3 (?) +
simple +  and compound +
2 (?) +  and 3 (?) +
Arctagrostis poaeoides +, Arctagrostis arundinacea +  and Arctagrostis angustifolia +
Arctagrostis latifolia subsp. arundinacea +
Arctagrostis latifolia +
subspecies +
membranous +
scabridulous +
acute +  and obtuse +
0.3 cm3 mm <br />0.003 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
parallel +  and converging +
faint +  and prominent +
aquatic +  and terrestrial +